package com.tjetc.service.impl;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.tjetc.common.JsonResult;
import com.tjetc.dao.FoodContentMapper;
import com.tjetc.dao.PostInfoMapper;
import com.tjetc.entity.FoodContent;
import com.tjetc.entity.PostInfo;
import com.tjetc.service.FoodContentService;
import com.tjetc.service.PostInfoService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;

@Service
public class FoodContentServiceImpl implements FoodContentService {
    @Autowired
    private FoodContentMapper foodContentMapper;
    @Override
    public JsonResult findById(Long id) {
        //selectById是mybatisplus提供的单表查询操作，生成sql语句都是mybatisplus内置
        FoodContent foodContent=foodContentMapper.selectById(id);
        return JsonResult.success(foodContent);
    }
    @Override
    public JsonResult findPage(String name, Integer pageNo, Integer pageSize) {
        //设置页码和每页数量
        Page<FoodContent> page=Page.of(pageNo,pageSize);
        //把adminPage传入mapper查询中，adminPage就是最后的分页结果
        Page<FoodContent>foodContentPage= foodContentMapper.selectPageLikeName(page,name);
        //convert方法转换Page中 records集合元素类型 Admin---->AdminView
        //new Function<Admin,AdminView>(){};表示创建一个实现Function的匿名类 对象
        return JsonResult.success(foodContentPage);
    }
    @Override
    public JsonResult deleteById(Long id) {
        int rows=foodContentMapper.deleteById(id);
        if (rows>0){
            return JsonResult.success("删除成功");
        }
        else {
            return JsonResult.fail("删除失败");
        }
    }
    //@Transactional用在service方法上，保证事务
    //注意：默认情况@Transactional只对运行时异常起作用(RuntimeException)
    @Transactional
    @Override
    public JsonResult save(FoodContent foodContentParam) {
        FoodContent foodContent=null;
        LocalDateTime now=LocalDateTime.now();
        //通过判断id值有无判断是新增还是更新，id值无是新增，id值有就是更新
        if(foodContentParam.getMealId()==null||foodContentParam.getMealId()<=0){
            //新增
            foodContent=new FoodContent();
            BeanUtils.copyProperties(foodContentParam,foodContent);
            foodContent.setCreateTime(now);
            foodContent.setUpdateTime(now);
            foodContentMapper.insert(foodContent);
            return JsonResult.success("新增成功",null);
        }else{
            //更新
            //根据id查询Admin信息
            foodContent=foodContentMapper.selectById(foodContentParam.getMealId());
            if(foodContent==null){
                return JsonResult.fail("用户不存在，更新失败");
            }
            //要更新的字段
            foodContent.setName(foodContentParam.getName());
            foodContent.setUpdateTime(now);
            foodContent.setIsDeleted(foodContentParam.getIsDeleted());
            foodContent.setCalories(foodContentParam.getCalories());
            foodContent.setDescription(foodContentParam.getDescription());
            foodContent.setDietaryNotes(foodContentParam.getDietaryNotes());
            foodContent.setImageUrl(foodContentParam.getImageUrl());
            foodContent.setIngredients(foodContentParam.getIngredients());
            foodContent.setPrice(foodContentParam.getPrice());
            foodContent.setStatus(foodContentParam.getStatus());
            foodContent.setType(foodContentParam.getType());
            int rows=foodContentMapper.updateById(foodContent);
            if (rows>0){
                return JsonResult.success("更新成功",null);
            }else {
                return JsonResult.fail("用户不存在，更新失败");
            }
        }
    }
}
